qmf::Handle Class Reference

A handle is like a pointer: refers to an underlying implementation object. More...

#include <qmf/Handle.h>

List of all members.

Public Member Functions
QMF_INLINE_EXTERN bool	isValid () const
QMF_INLINE_EXTERN bool	isNull () const
QMF_INLINE_EXTERN	operator bool () const
	Conversion to bool supports idiom if (handle) { handle->...
QMF_INLINE_EXTERN bool	operator! () const
	Operator ! supports idiom if (!handle) { do_if_handle_is_null(); }.
void	swap (Handle< T > &h)
Protected Types
typedef T	Impl
Protected Member Functions
QMF_INLINE_EXTERN	Handle ()
	Handle (const Handle &)
Handle &	operator= (const Handle &)
Protected Attributes
Impl *	impl

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Detailed Description

A handle is like a pointer: refers to an underlying implementation object.

Copying the handle does not copy the object.

Handles can be null, like a 0 pointer. Use isValid(), isNull() or the conversion to bool to test for a null handle.

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Member Typedef Documentation

typedef T qmf::Handle::Impl [protected]

Definition at line 56 of file Handle.h.

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Constructor & Destructor Documentation

QMF_INLINE_EXTERN qmf::Handle::Handle

(

)

[inline, protected]

Definition at line 57 of file Handle.h.

qmf::Handle::Handle

(

const Handle &

)

[protected]

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Member Function Documentation

QMF_INLINE_EXTERN bool qmf::Handle::isNull

(

)

const [inline]

Returns:

true if handle is null. It is an error to call any function on a null handle.

Definition at line 45 of file Handle.h.

QMF_INLINE_EXTERN bool qmf::Handle::isValid

(

)

const [inline]

Returns:

true if handle is valid, i.e. not null.

Definition at line 42 of file Handle.h.

QMF_INLINE_EXTERN qmf::Handle::operator bool

(

)

const [inline]

Conversion to bool supports idiom if (handle) { handle->...

}

Definition at line 48 of file Handle.h.

QMF_INLINE_EXTERN bool qmf::Handle::operator!

(

)

const [inline]

Operator ! supports idiom if (!handle) { do_if_handle_is_null(); }.

Definition at line 51 of file Handle.h.

Handle& qmf::Handle::operator=

(

const Handle &

)

[protected]

void qmf::Handle::swap

(

Handle< T > &

h

)

[inline]

Definition at line 53 of file Handle.h.

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Member Data Documentation

Impl* qmf::Handle::impl [protected]

Definition at line 63 of file Handle.h.

Referenced by qmf::Handle< AgentEventImpl >::isValid(), qmf::Handle< AgentEventImpl >::isNull(), qmf::Handle< AgentEventImpl >::operator bool(), qmf::Handle< AgentEventImpl >::operator!(), and qmf::Handle< AgentEventImpl >::swap().

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The documentation for this class was generated from the following file:

• qmf/Handle.h